Stereocontrolled Preparation of a Nonpeptidal (−)-Spirobicyclic NK-1 Receptor Antagonist
作者:Peter E. Maligres、Marjorie M. Waters、Jaemoon Lee、Robert A. Reamer、David Askin、Michael S. Ashwood、Mark Cameron
DOI:10.1021/jo0157472
日期:2002.2.1
uted aryl group and a 2-phenyl-3-piperidone B. The stereochemistry in the spirobicyclic system bearing three chiral centers is initially set via a highly diastereoselective zinc-mediated coupling of the allylic bromide 23 to the optically active ketopiperidine 3. The remaining benzylic asymmetric center is set by a diastereoselective hydroboration followed by cyclization to the spirobicyclic system
描述了螺双环NK-1受体(物质-P)拮抗剂1对映体的合成。逆合成分析显示带有环丙氧基取代的芳基的烯丙基卤化物A和2-苯基-3-哌啶酮B。带有三个手性中心的螺双环体系中的立体化学最初是通过高度非对映选择性锌介导的烯丙基溴的偶联而设定的通过非对映选择性的氢硼化,然后环化成螺二环系统,将剩余的苄基不对称中心由图23中的右旋活性酮基哌啶3得到。